hussey



(No Model.) 2 sheets-sheet 1.

S. HUSSEY.

ROCK DRILL.

No. 244,608.- Y Patented July 19,1881.

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l (No Model.) v 2 Sheets-Sheet S. HUSSBY,

4 Roux DRILL. y 1\Io.244,6oz. A Patented July 19,1881.

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sYLvANs HUssEY, or GowANDA, New YORK.

ROCK-DRILL.

ASPECIFIOZBATION forming part of Letters Patent No. 244,608,7dated July 19, 1881.

Y I Y Applicationl filed December 4, 1880. (No model.)

To all 'whom it may concern:

Beit known that-I, SYLvANUs HUssEY, of

Gowanda, in the county of Gattaraugus and State of-New York, have invented new and useful Improvements in Rock-Drills, of'which the following is a specification, reference being had to the accompanying drawings.

This invention relates more particularly to a rock-drill for which Letters Patent of the United States No. 232,609 were granted to me September 28, 1880, to which reference is hereA made for a fulldescription thereof.

The object of my present improvements is to increase the adjustability and improve the operation of the drill;V and it consists, iirst, of the mechanism whereby the feed `is given to the drill-bar; secon.d,in the particular construction of the device whereby the drill-bar is raised and lowered; third, in the construction of the device -whereby the drill-bar is clamped during its upward and downward movement; fourth, in constructing'the mechanism whereby the drill-bar is raised with an extensible lower portion, whereby the range of movement of the drill-bar can be adj usted, fifth, of the particular constrnction'of this extensible portion of the elevating mechanism;4 seventh, in providing the lower end of the swinging drill-frame with an adjustable foot, whereby the same can be steadied and, nally,'of the'particular construction of thisadj ustabley foot, aswill be hereinafter fully set forth. Y l I 1 In the accompanying drawings,"consisting of two sheet-s, Figure 1 is aside elevation, Fig. 2.a sectional elevation, and Fig. 3 a front elevation, of a rock-drill provided with `my improvements. griping mechanism, whereby the drill-rod is operated. Fig.5is a horizontal section inline x w, Fig. 4. Fig. 6 is a vertical section of the movable frame, vwhich carries the .eccentric view of the movable frame. Fig. 8 is avertical section, onan enlarged scale, of a portion of the adjustable foot of the swinging frame. Fig. 9 is a horizontal section in line 'w w, Fig. 8. Fig. l0 is a section, on an enlarged scale',

through one of the segments in which the movable rameisadjuisted. Like letters of reference refer to like parts in the' several figures.

A represents the tripod-base; B, themain Fig. 4 isa vertical section of the' frame connected to the base by a vertical pivotbolt, b and c, the swinging frame hung on the horizontal shaft c, which is journaled in bearings in the frame B in theusual manner.

Drepresents two segments formed with the frame B concentric with the shaft c, and E represents therear cross-bar of the swingingirame C. The ends of the cross-bar E are provided 6o with pins or bolts c, which project through the slot of the segmentD, and are provided on the outer side of the segment with a washer, e', and nut e2. The segments Dare provided on their outer sides with serrations, andthe washer e' is provided on its inner side with corresponding serrations, so that upon tightening the screw-nut c2 the serrations of the washer will be forced into ,f the serrations of the segment, whereby the swinging frame C is held securely 7o in place. v A

F represents the drill-bar, and ff the levers by which the drill-bar is operated. The central lever, j', engages against the under side of the griping mechanism, and serves 4to raise the 7 5 drill-bar 5 and the side levers, f', are connected by rods or links g with the upper end of the griping mechanism, and serve to clamp the drill-bar during its downward movement.

The, griping mechanismv is inclosed in a cas- 8o ing, HH', and consists of `two or .more eccentrics, h, pivoted between ribs c', forming part of a frame, I, which slides loosely on the drill-bar. The ribs t' are connected at their upper ends by a ring, i', which issecured to or cast in one 85 piece with the ribs. The eccentrics h are provided with upwardly-extending arms 71. and downwardly-extending arms h2, the latter being curved outward, as shown. The frame I rests by means of its ring t against a shoulder, 9o j, formed on the innerside of the lower portionH, of the casing in which the griping mechanism is inclosed. clamps in line z z, Fig. 7. Fig.7 is a perspective f .and L is a sleeve which surrounds the bar F,

and which has a conical head, L', which projects into the casing H and between the lower arms, h2, of theeccentrics h. The headL4 rests upon an oifset or shoulder ofthe headK.

l is a spiral spring arranged in an annular 10o recess of the head L around the drill-bar F, and bearing with its upper end lagainst the under s ide of the frame I, to which the eccentrics are attached, thereby holding Athe frame I4 against the shoulder j and preventing it from coming in contact with the conical head L'.

The lower end of the sleeve L is provided with an external screw-thread, m, to which is applied a screw-sleeve, M, which is secured in place byajam-nut, m. By adjusting the screwsleeve M on the sleeve L the length of the latter can be increased or reduced, thereby in creasing or reducing the stroke of the drill-bar.

N represents the head, whereby the eccentrics h are clamped against the drill-bar during` the downward movement of the latter. It is provided on its under side with a concave recess, n, which engages over the upper arms, h', of the eccentrics, and has an annular shoulder, n', which strikes against an overlapping ange, u2, on the upper end of the upper p0rtion, H', of the casin g. The head N is attached to the links g by wrist-pins g. As the central lever, f, moves upward it strikes against the lower end of the sleeve L, raising the latter and forcing its conical head against the lower arms, h2, of the eccentrics, whereby the arms h2 are swung outward and the eccentrics h tightened on the drill-bar. The latter is thereby raised until the lever f has completed its upward stroke. Just before the upward movement 0f the lever f and the drill-bar is completed the side levers, j" f', are released, whereby the head N is permitted to drop over the upper arms, h', of the eccentrics h, thereby pressing the arms 7a inward and clamping the eccentrics against the drill-bar. The sleeve L and the lever f are now released by the actuating mechanism, and the drill-bar is forced down by the reaction of the spring O, the eccentrics h clamping the drill-bar during this downward movement. The side levers, j", begin their upward movement somewhat in advance of the central lever, f, whereby the head N is raised and the upper arms, 7L', of the eccentrics are released before tlie sleeve L is raised and the lower arms, h2, are actuated by the conical head L. The springl keeps the frame I in its highest position in contact with the shoulder j, thereby leaving an open space between the lower ends of the ribs t' and the lower head, K, of the casin g. This open space permits the blow to be delivered with full force upon the rock, and permits the frame I to descend in the casing as the blow is delivered until the ribs i strike the bottom plate, K. As soon as the head N is raised by the upward movement of the side levers, f', the springcl, which was compressed by the downward movement of the frame I, raises the latter against the shoulder j, and thereby causes the eccentrics 7L to seize the drill-bar at a higher point. The distance to which the frame I is so raised constitutes the feed which the drill-bar receives at the beginning of every upward stroke.

P l? represent the upright bars of the swinging frame C, and Q, represents an adjustable foot or rest, arranged between the lower portions of the bars l? l? to steady the swinging frame and the lower end of the drill-bar. The

rest Q consists of a sleeve or hollow cylinder,

AIt, secured between the lower ends of the bars l? I), and parallel therewith, and a tube, S, sliding loosely in the sleeve R, and secured therein in any desired position by a ring, s, which is arranged in a recess in the sleeve It and surrounds the tube S. The ring s is provided with a threaded shank, s', which projects out of the recess in the sleeve It, and which carries a screw-nut, t, bearing against the outer side ot' the sleeve It, so that upon tightening the nut t theringsisdrawn against the tube S, and the latter secured in place, while upon releasing the ring s the tube can be freely raised and lowered in the sleeve It.

T is a pointed rod or bar fitted loosely in the tube S, and having its lower portion provided with an external screw-thread, u, working in a screw-nut, U, attached to the lower end of the tube S by a screw-thread or otherwise. The upper end of the rod Tis provided with a suitable handle for turning it. The rod T is raised and lowered by turning itin the screw-nut U, and when this adjustment is insufficient the tube S can be raised orlowered, thereby affording a large range of adjustment.

The sleeve It carries an arm, R', which is provided with an aperture, in which the drillbar is guided.

I claim as my invention- 1. The combination, with the drill-bar, of a casing, H, inclosing the griping mechanism, a frame, I, which carries the griping mechanism, and which has a limited vertical movement in the casing H, a spring, Z, which tends to hold the frame I in its highest position, and mechanism whereby the griping mechanism is released before the upward stroke of the drillbar begins, whereby the frame I is raised in the casing and the griping mechanism caused to seize the drill-bar at ahigherpoint at every upward' stroke of the drill-bar, substantially as set forth.

2. The combination, with the drill-bar, of the movable sleeve L, casing H,provided with shoulderj, frame I, carrying the eccentrics h, and a spring, l, interposed between the sleeve L and the frame I, substantially as set forth.

3. The combination, with the drill-bar, of the movable sleeve L, casing H, having a shoulder, j, frame I, carrying the eccentrics 7i, provided with arms h h2, a spring, l, interposed between the sleeve L and frame I, and the head N, having a recess, u, substantially as set forth.

4. The combination, with the drill-bar, ofl

IOO

IOS

IIO

6. The combination, with the base A, and of a stationaryisleeve, l R, a tube, S, made admain frame B mounted thereon, of the drilljustable in the sleeve R, and provided with a frame C, hung in the frame Randadapted to threaded portion U, and a rod or bar, T, havswing in a vertical plane, and an adjustable ing a screw-thread, u, engaging with the 5 foot or rest, Q, secured to the lower part ofthe threaded portion U of the tube S, substan- 15 swinging frame C, whereby the latter is suptially as set forth.

ported on the ground when adjusted at various. SYLVANUS HUSSEY. angles, substantially as set forth. Witnesses:

7. The combination, with the swinging dri11- R. M. HUSSEY,

1o frame'G, of an adjustable footorrest composed A. S. CARPENTER. 

